Patent GB-432620-A (GB)
Title: Improvements in or relating to electric table fans
IPC: F04D25/10
Filed: 1934-09-28
Abstract: 432,620. Coin-freed electric table fan. HARTRIDGE, O. C., 118, Holborn, London. Sept. 28, 1934, Nos. 27896 and 27897. Convention dates, Sept. 28, 1933 and July 28, 1934. [Class 27] The blades of an electric table fan are driven by a small electric motor 9, Figs. 3 and 4, supplied with current from a dry battery located in the base of the apparatus and having leads 6, 7, of which the lead 7 is connected to one terminal 8 of the motor. The other lead 6 is connected to an insulated plate 10, a coincontrolled switch being interposed between this plate and the casing of the apparatus from which a lead 11 goes to the other terminal 12 of the motor. The switch comprises a pair of spring-controlled contact levers 67 pivoted at 68 to the plate 10 and normally bearing against an insulated portion 72 of a metal roller 70 which is rotatably mounted on a pin 71 and kept in circuit breaking position by a spring coiled round the pin 71. To close the switch a coin is inserted thereby rocking a lever 50 which through a resilient connection 46, 47 rocks a lever 45 which moves a lever 37 anticlockwise to a vertical position where it is held by a pawl lever 59. A hooked arm 80 attached to the lever 45 rotates the roller 70 in opposition to its spring but the contact levers 67 are held away from the roller by the insulated end of a lever 66 pivoted at 65 until the coin drops down the insertion shoot. The roller is held in its displaced position by a pawl 81 engaging a ratchet tooth 74 on a disc integral with the roller. Next a lever 54 is moved by the weight of the dropping coin and, through a link 57, releases the pawl lever 59 allowing the lever 37 to return to its initial position. The lever 54 through another link 63 rocks the lever 66 thereby allowing the contacts 67 to engage the roller 70 and complete the circuit of the motor 9. The motor through gearing rotates in the direction of an arrow 85 a wheel 35 having on its face pins 36 equally spaced apart. After a predetermined time, a pin 36 engages a lever 84 fixed to the shaft 65 to move this lever away from a stop 87 against the action of a spring. A pawl 89 carried by the lever 84 engages, when the lever 84 returns to the initial position after the passing of the control pin 36, the pawl 81 to release the roller 70 which thus returns to its initial position and breaks the circuit. All the parts now assume their initial position, and a further coin must be inserted before the fan can again be actuated. In a modified construction, Fig. 12, a lever 161 depressed by insertion of a coin rocks a shaft 153 and moves the metallic portion of a drum 154 into contact with levers 169 to close the circuit of the motor. A pin 137<1> of a series on a disc 136 opens the circuit after an interval by pressing aside a lever 139. Coin action, thrust and weight.-In the first form, Figs. 3 and 4, the coin while being thrust in to a shoot 19, Fig. 3, engages a pin 52 on the lever 50 and moves this lever. The coin then dropping down the shoot moves the lever 54. In the modification, Fig. 12, the coin 165 inserted in a shoot 164 tilts by its weight the lever 161. The lever moves down until a segment 152, loose on the shaft 153 but having a notch engaged by a pin on the drum 154, meets the end of a stop lever 148. When the lever 139 is moved by a pin 137 a pawl 145 thereon is engaged with the stop lever 148, so that, when the lever 139 returns to its initial position, the stop lever 148 is rocked to allow the coin lever to descend further. The coin then rolls off the lever 161 through an enlargement of the shoot 164 to a money-box, and the lever 161 returns under action of a counterweight 168 to break the circuit. Coins, testing.-A coin thrust into the shoot 19, Fig. 3a, may be tested for thickness. The pin 521 of the lever 50 has a roller 106 with a conical side flange 111. A thin coin of the proper diameter will enter the central portion 108 of the roller without actuating the lever 50. It is ejected through a return slot by the lever 37. Registering.-The shaft 65 of the arm 66 carries another arm 92 which through a driving pawl actuates a counting mechanism.